Work vehicle

Abstract

Provided is a work vehicle capable of improving operability of a position lever and a hydraulic operation lever.　This work vehicle includes: a position lever 310 that is arranged on a right console provided on a side of a seat and can adjust a lifting position of a lifting device; and a plurality of hydraulic operation levers (a first hydraulic operation lever 410A, a second hydraulic operation lever 410B, and a third hydraulic operation lever 410C) that are arranged on a rear side of the position lever 310 in the console and can control supply of hydraulic pressure to a work device. The position lever 310 and the hydraulic operation levers are arranged so that the operation direction thereof in a plan view is parallel to the operation direction of other levers arranged on a front side, or is at a larger angle with respect to the front-rear direction than the operation direction of the other levers arranged on the front side.

Description

Work vehicle

[0001] The present invention relates to a technique for a work vehicle equipped with a hydraulic control lever.

[0002] BACKGROUND ART Conventionally, technology for a work vehicle equipped with a hydraulic control lever used to control the hydraulic pressure of a work device provided on the vehicle body is well known, as disclosed in Patent Document 1, for example.

[0003] Patent Document 1 describes a tractor equipped with multiple hydraulic control levers arranged side by side, front and rear, on the side of the seat (above the fender). Operating the hydraulic control levers allows the spool of a control valve connected to the hydraulic control lever to be operated. This allows the supply of hydraulic pressure to a work implement, such as a snow blower, attached to the tractor to be controlled.

[0004] As described in Patent Document 1, it is common for work vehicles such as tractors to be provided with multiple hydraulic control levers for controlling the working implements. In addition to the hydraulic control levers, it is also common for work vehicles to be provided with a position lever for controlling the elevation and lowering of the working implements. In work vehicles equipped with multiple operating tools like this, there is a demand for improved operability of the operating tools to reduce the workload of the operator (driver).

[0005] Japanese Patent Application Laid-Open No. 2002-250303

[0006] One aspect of the present disclosure has been made in consideration of the above-described situation, and the problem it aims to solve is to provide a work vehicle that can improve the operability of the position lever and hydraulic control lever.

[0007] The problem to be solved by one embodiment of the present disclosure has been described above, and next, the means for solving this problem will be described.

[0008] In one aspect of the present disclosure, a vehicle includes a position lever that is disposed on a console provided on the side of a seat and that can adjust the elevation position of a lifting device, and a plurality of hydraulic control levers that are disposed on the console rearward of the position lever and that can control the supply of hydraulic pressure to a working device, wherein the position lever and the hydraulic control levers are disposed so that the operation direction in a plan view is parallel to the operation direction of other levers disposed in front of them or at a larger angle with respect to the front-to-rear direction than the operation direction of other levers disposed in front of them. According to one aspect of the present disclosure, the operability of the position lever and the hydraulic control levers can be improved.

[0009] In one aspect of the present disclosure, the hydraulic control lever includes a first link mechanism including a first swinging part swingable about a first swing shaft and transmitting an operating force of the position lever, a first support part swingably supporting the first swinging part via the first swing shaft, a second link mechanism including a second swinging part swingable about a second swing shaft and transmitting an operating force of the hydraulic control lever, and a second support part swingably supporting the second swinging part via the second swing shaft and fixed to the first support part. According to one aspect of the present disclosure, by fixing the first support part supporting the first link mechanism (first swinging part) and the second support part supporting the second link mechanism (second swinging part) to each other, one of the first support part and the second support part can be reinforced by the other member.

[0010] In one aspect of the present disclosure, the second support portion is fixed to the fender at a position lower than the second pivot shaft and is fixed to the first support portion at a position higher than the second pivot shaft. According to one aspect of the present disclosure, the second support portion, in which the second pivot shaft is provided at a position higher than the fixed position relative to the fender, can be reinforced by the first support portion.

[0011] In one aspect of the present disclosure, the first support portion is fixed to the fender at a position lower than the second pivot shaft and at a position higher than the second pivot shaft. According to one aspect of the present disclosure, the second support portion can be more firmly reinforced by the first support portions fixed to the fender above and below the second pivot shaft.

[0012] In one aspect of the present disclosure, the first support portion is fixed to the fender at a position lower than the first pivot shaft and at a position higher than the first pivot shaft. According to this aspect of the present disclosure, the second support portion can be more firmly reinforced by the first support portions fixed to the fender above and below the first pivot shaft.

[0013] In one aspect of the present disclosure, the first support portion supports the position lever so that the position lever can swing. According to one aspect of the present disclosure, the first support portion supports not only the first link mechanism (first swing portion) but also the position lever, thereby simplifying the structure.

[0014] In one aspect of the present disclosure, the first link mechanism includes a horizontal link portion that is disposed with its longitudinal direction oriented substantially horizontally and that connects the position lever and the first swing portion. According to one aspect of the present disclosure, the use of the horizontal link portion increases the degree of freedom in the horizontal arrangement of the position lever.

[0015] According to one aspect of the present disclosure, the operability of the position lever and the hydraulic control lever can be improved.

[0016] 1 is a left side view showing the overall configuration of a tractor according to one embodiment of the present disclosure; 2 is a plan view showing the vicinity of the right console in the cabin; 3 is a perspective view showing an operation mechanism provided along a fender; 4 is a perspective view showing a loader operation mechanism; 5 is a left side view showing the loader operation mechanism; 6 is a right side view showing a closing mechanism; 7 is an exploded perspective view showing the closing mechanism; 8 is a perspective view showing a position operation mechanism and a hydraulic operation mechanism; 9 is a partially exploded perspective view showing a position operation mechanism and a hydraulic operation mechanism; 10 is a plan view showing a position operation mechanism and a hydraulic operation mechanism; 11 is a left side view showing a position operation mechanism and a hydraulic operation mechanism; 12 is a right side view showing a position operation mechanism and a hydraulic operation mechanism;

[0017] In the following description, the directions indicated by arrows U, D, F, B, L, and R in the drawings are defined as the upward direction, downward direction, forward direction, backward direction, leftward direction, and rightward direction, respectively. Note that the forward direction is the direction in which the tractor 1 moves forward, and the backward direction is the direction in which the tractor 1 moves backward.

[0018] First, the overall configuration of a tractor 1 according to one aspect of the present disclosure will be described.

[0019] As shown in FIG. 1 , the tractor 1 mainly comprises a machine frame 2 , an engine 3 , a transmission case 4 , a lifting device 5 , front wheels 6 , rear wheels 7 , a bonnet 9 , a cabin 10 , a steering wheel 12 , and a front loader 20 .

[0020] The vehicle frame 2 is a frame-like member formed by appropriately combining a plurality of plate materials. The vehicle frame 2 is formed in a generally rectangular shape when viewed from above. The vehicle frame 2 is disposed with its longitudinal direction oriented in the front-to-rear direction. An engine 3 is fixed to the rear of the vehicle frame 2. A transmission case 4 is fixed to the rear of the engine 3.

[0021] A lifting device 5 is provided at the rear of the transmission case 4. Various types of working implements (e.g., a tiller) can be attached to the lifting device 5. The lifting device 5 can raise and lower the attached working implement by an actuator such as a hydraulic cylinder.

[0022] The front portion of the vehicle frame 2 is supported by a pair of left and right front wheels 6 via a front axle mechanism (not shown). The rear portion of the transmission case 4 is supported by a pair of left and right rear wheels 7 via a rear axle mechanism (not shown). The pair of left and right rear wheels 7 are generally covered from above by fenders 8.

[0023] The engine 3 is covered by a hood 9. The power of the engine 3 is changed in speed by a transmission (not shown) housed in a transmission case 4, and then can be transmitted to the front wheels 6 via the front axle mechanism, and can be transmitted to the rear wheels 7 via the rear axle mechanism. The front wheels 6 and rear wheels 7 are driven to rotate by the power of the engine 3, allowing the tractor 1 to travel.

[0024] A cabin 10 is provided behind the engine 3. A living space for an operator is formed inside the cabin 10. As shown in Figure 2, the living space is equipped with a steering wheel 12 for adjusting the turning angle of the front wheels 6, a right console 13 provided with various operating tools, and a seat 14 for the operator to sit in.

[0025] The floor of the cabin 10 includes a first floor surface 10a formed at the front of the living space and a second floor surface 10b formed at the rear of the living space. The first floor surface 10a and the second floor surface 10b are formed in a stepped shape, and the second floor surface 10b is formed at a higher position than the first floor surface 10a. The seats 14 are provided on the second floor surface 10b.

[0026] The right console 13 is where operating tools (operating mechanisms) for performing various operations related to the operation of the tractor 1 are arranged. The right console 13 is formed in a shape that is long in the front-to-rear direction. The right console 13 is arranged on the right side of the cabin 10. More specifically, the right console 13 is arranged to the right of the seat 14 and the steering wheel 12. The right console 13 is arranged so as to cover the left and right inner side surfaces of the right fender 8.

[0027] The right console 13 is provided with, for example, a loader lever 110 for operating the front loader 20, a position lever 310 for raising and lowering the lifting device 5, and hydraulic control levers 410A, 410B, and 410C used to control the hydraulic pressure for the work equipment attached to the tractor 1.

[0028] The above-mentioned operating tools are merely examples, and various other operating tools may be arranged on and around the right console 13. For example, an accelerator lever for adjusting the engine 3 RPM, a tilling depth adjustment dial for adjusting the tilling depth of the tiller, a pump switch for raising and lowering the lifting device 5 to a predetermined position, etc. may be provided.

[0029] Although not described in this embodiment, various operating tools can also be arranged on a left console (not shown) provided on the left side of the seat 14 .

[0030] 1, a front loader 20 is attached to the front of the tractor 1. The front loader 20 includes side frames 21, a boom 22, and a bucket 23.

[0031] The side frames 21 are detachably attached to the body (machine body frame 2 and transmission case 4) of the tractor 1. The side frames 21 are provided on the left and right sides of the body, respectively.

[0032] The boom 22 is swingably supported by each of the left and right side frames 21. The boom 22 is disposed so as to extend downward and forward from the upper part of the side frame 21. A boom cylinder 22a is provided on the boom 22. The boom 22 can swing relative to the side frame 21 by extension and contraction of the boom cylinder 22a.

[0033] The bucket 23 is formed to open forward and is swingably connected to the front end of the boom 22. The bucket 23 can swing relative to the boom 22 by extension and contraction of a bucket cylinder 23a.

[0034] The operator can operate the front loader 20 by swinging the loader lever 110 back and forth and left and right to extend and retract the boom cylinder 22 a and the bucket cylinder 23 a.

[0035] The operation mechanisms (loader operation mechanism 100, position operation mechanism 300, and hydraulic operation mechanism 400) provided on the right console 13 will be described below.

[0036] As shown in Figures 2 and 3, the right console 13 is provided with a loader operation mechanism 100, a position operation mechanism 300, and a hydraulic operation mechanism 400. Note that the right console 13 is not shown in Figure 3 for ease of explanation. Each operation mechanism is arranged along the inner surface of the right fender 8. The loader operation mechanism 100, the position operation mechanism 300, and the hydraulic operation mechanism 400 are arranged in a line from front to back. The lower part of each operation mechanism is covered by the right console 13, and operating tools (such as a loader lever 110 and a position lever 310, which will be described later) for operation by the operator are arranged to protrude upward from the right console 13. Note that the right console 13 is not shown in Figure 3 and subsequent figures. Below, the configuration of each operation mechanism will be described in order.

[0037] First, the loader operation mechanism 100 shown in Figures 3 to 5 will be described. The loader operation mechanism 100 is used to operate the front loader 20. The loader operation mechanism 100 mainly includes a loader lever 110, a first support portion 120, a second support portion 130, a third support portion 140, a locking mechanism 150, a link mechanism 160, and the like.

[0038] The loader lever 110 is an operating tool used by an operator to operate the front loader 20. The loader lever 110 is formed in a longitudinal shape extending vertically. The loader lever 110 includes a connecting block 111, a cylindrical portion 112, a front-rear swing shaft 113, and the like.

[0039] 4 and 5 is a substantially rectangular parallelepiped member. The connection block 111 is provided below the loader lever 110.

[0040] The cylindrical portion 112 is a portion that can engage with a locking mechanism 150 (insertion portion 152), which will be described later. The cylindrical portion 112 is formed in a cylindrical shape with its axis oriented in the vertical direction. The cylindrical portion 112 is provided on the bottom surface of the connecting block 111.

[0041] The front-rear swing shaft 113 is the central axis for swinging the loader lever 110 forward and backward. The front-rear swing shaft 113 is formed in a rod shape with its axis facing in the left-right direction. In this embodiment, an example is shown in which the front-rear swing shaft 113 is formed by a bolt. The front-rear swing shaft 113 is provided so as to penetrate a swing support part 121 and the connecting block 111, which will be described later, in the front-rear direction. This supports the connecting block 111 so as to be swingable forward and backward relative to the swing support part 121.

[0042] The first support portion 120 is for supporting the loader lever 110 so that the loader lever 110 can swing back and forth. The first support portion 120 mainly includes a swing support portion 121, a plate-shaped portion 122, a left-right swing shaft 123, and the like.

[0043] The swing support portion 121 is a portion that is connected to the loader lever 110 via the front-rear swing shaft 113. The swing support portion 121 is formed by appropriately bending a plate-like member. In a plan view, the swing support portion 121 is formed in a substantially U-shape that opens toward the rear. The connecting block 111 is disposed between a pair of left and right plate-like portions of the swing support portion 121. In this state, the front-rear swing shaft 113 is provided so as to penetrate the swing support portion 121 and the connecting block 111 in the front-rear direction. In this manner, the swing support portion 121 supports the loader lever 110 so that it can swing back and forth. The swing support portion 121 is also supported by a second support portion 130 (described later) so that it can swing back and forth.

[0044] A left-right swing shaft 123 (described later) is fixed to the plate-like portion 122. The plate-like portion 122 is formed in a flat plate shape with its plate surface facing forward and backward, and is fixed to the rear portion of the swing support portion 121.

[0045] The left-right swing shaft 123 is the central axis for swinging the loader lever 110 left and right. The left-right swing shaft 123 is formed in a cylindrical shape with its axis facing the front-rear direction. The left-right swing shaft 123 is fixed to the plate-shaped portion 122 so as to protrude rearward from the plate-shaped portion 122. The axis of the left-right swing shaft 123 is arranged so as to be perpendicular to the axis of the front-rear swing shaft 113.

[0046] The second support portion 130 is for supporting the first support portion 120 so that the first support portion 120 can swing left and right. The second support portion 130 mainly includes a cylindrical portion 131, a reinforcing portion 132, an upper fixing portion 133, a lower fixing portion 134, and the like.

[0047] The cylindrical portion 131 is a portion that supports the left-right oscillation shaft 123 so that it can rotate. The cylindrical portion 131 is formed in a cylindrical shape with its axis facing the front-rear direction. The left-right oscillation shaft 123 is inserted into the cylindrical portion 131 so that it can rotate. The cylindrical portion 131 is fixed to the upper part of a reinforcing portion 132, which will be described later.

[0048] The reinforcing portion 132 shown in FIGS. 4 to 7 is a portion for reinforcing the second support portion 130. The reinforcing portion 132 is formed longitudinally extending in the up-down direction. The reinforcing portion 132 is formed by bending both front and rear ends of a plate-like member to the right, forming a generally U-shaped portion that opens to the right in a plan view. Specifically, as shown in FIG. 6 , the reinforcing portion 132 includes a pair of opposing first plate-like portions 132a and a second plate-like portion 132b that connects the left ends of the first plate-like portions 132a. By forming the pair of first plate-like portions 132a extending left and right in this manner, deflection of the reinforcing portion 132 in the left-right direction can be suppressed. The reinforcing portion 132 is arranged to extend from above to below the second floor surface 10b of the cabin 10 through an opening 10c (see FIG. 7 ) formed at the right end of the second floor surface 10b.

[0049] The upper fixing portion 133 shown in Figures 4 and 5 is a portion for fixing the upper part of the second support portion 130 to the fender 8. The upper fixing portion 133 is formed by appropriately combining appropriate members (such as multiple plate-shaped members). The upper fixing portion 133 is fixed to the right side surface of the upper end portion of the reinforcing portion 132. A nut 133a is fixed to the upper fixing portion 133. The nut 133a is positioned at approximately the same position as the cylindrical portion 131 in the up-down direction. A bolt (not shown) is fastened to the nut 133a from the outer surface (right side surface) of the fender 8, thereby fixing the upper fixing portion 133 to the fender 8 (see Figure 3).

[0050] The lower fixing portion 134 shown in Figures 4 to 7 is a portion for fixing the lower part of the second support portion 130 to the fender 8. The lower fixing portion 134 is formed by bending a plate-like member into a generally U-shape that opens to the left in a plan view. The lower fixing portion 134 is disposed immediately below the second floor surface 10b of the cabin 10. A protrusion 134a that protrudes upward is formed at the upper part of the right side surface of the lower fixing portion 134. The lower end portion of the reinforcing portion 132 is fixed to the inner surface (left side surface) of the protrusion 134a. The right side surface of the lower fixing portion 134 is fixed to the fender 8 with an appropriate fastener (bolt, nut, etc.).

[0051] 4 and 5 , the third support portion 140, together with the second support portion 130, supports the first support portion 120 so that it can swing left and right. The third support portion 140 is formed of a plate-like member that is elongated in the vertical direction and has a plate surface facing the front-rear direction. The third support portion 140 includes a swing shaft 141, a fixed portion 142, etc.

[0052] The swing shaft 141 serves as the central axis for swinging the loader lever 110 left and right. The swing shaft 141 is formed in a cylindrical shape with its axis facing the front-rear direction. The swing shaft 141 is arranged on the same axis as the left-right swing shaft 123 of the first support part 120. The swing shaft 141 is fixed to the third support part 140 so as to protrude rearward from an upper part of the third support part 140. The rear part of the swing shaft 141 is inserted into the front surface of the swing support part 121 of the first support part 120 so as to be rotatable relative to the third support part 140.

[0053] 3 and 4 is a portion for fixing the lower part of the third support part 140 to the fender 8. The fixing part 142 is formed in a plate shape with the plate surface facing in the left-right direction. The fixing part 142 is fixed to the lower part of the third support part 140. The fixing part 142 is fixed to the fender 8 with appropriate fixing devices (bolts, nuts, etc.).

[0054] 4 and 5 is for restricting the swing of the loader lever 110. The lock mechanism 150 includes a lever 151, an insertion portion 152, and the like.

[0055] The lever 151 is an operating tool for restricting the swing of the loader lever 110. The lever 151 is disposed so as to protrude forward beyond the third support portion 140.

[0056] The insertion portion 152 is a portion that is inserted into the cylindrical portion 112 of the loader lever 110. The insertion portion 152 is formed in a cylindrical shape with an outer diameter that is smaller than the inner diameter of the cylindrical portion 112. The insertion portion 152 is disposed below the cylindrical portion 112 with its axis facing in the vertical direction. The rear end of the lever 151 is fixed to the insertion portion 152.

[0057] By operating the lever 151 and inserting the upper part of the insertion part 152 into the lower part of the cylindrical part 112, it is possible to restrict the swinging of the cylindrical part 112. In this way, by using the locking mechanism 150, it is possible to restrict the swinging of the loader lever 110 as needed.

[0058] The link mechanism 160 is for transmitting the operating force of the loader lever 110. The link mechanism 160 mainly includes a first rod 161, a second rod 162, a lower link 163, and the like.

[0059] The first rod 161 is used to transmit the forward and backward swing operation of the loader lever 110. The first rod 161 is formed in a bar shape with its longitudinal direction facing up and down. The upper end of the first rod 161 is connected to the rear side surface (rearward of the forward and backward swing shaft 113) of the connecting block 111 of the loader lever 110. The lower part of the first rod 161 extends below the second floor surface 10b through an opening 10c (see FIG. 7) in the floor surface (second floor surface 10b) of the cabin 10. Note that the link mechanism 160 (first rod 161, second rod 162, etc.) is not shown in FIG. 7.

[0060] The second rod 162 is for transmitting the left-right swing operation of the loader lever 110. The second rod 162 is formed in a bar shape with its longitudinal direction facing the up-down direction. The upper end of the second rod 162 is connected to the left end (to the left of the left-right swing shaft 123) of the plate-shaped portion 122 of the first support portion 120. The lower portion of the second rod 162 extends below the second floor surface 10b through an opening 10c (see FIG. 7) in the floor surface (second floor surface 10b) of the cabin 10.

[0061] The lower link 163 transmits the motion of the first rod 161 and the second rod 162. The lower link 163 is made up of a plurality of link members. The lower link 163 is connected to a control valve (not shown) that controls the supply of hydraulic oil to the front loader 20.

[0062] The swinging operation of the loader lever 110 forward / backward and left / right is transmitted to a control valve (not shown) via a link mechanism 160, and the control valve can be operated. By operating the control valve, the supply of hydraulic oil to the boom cylinder 22a and bucket cylinder 23a of the front loader 20 can be controlled, and the front loader 20 can be operated as desired.

[0063] As described above, an opening 10c is formed in the second floor surface 10b of the cabin 10 in order to extend a part of the loader operation mechanism 100 (such as the reinforcing portion 132) below the cabin 10. Therefore, there is a risk that noise outside the cabin 10 may be transmitted into the living space of the cabin 10 through the opening 10c. Therefore, in this embodiment, a closing mechanism 200 is provided to close the opening 10c in order to prevent noise from being transmitted into the cabin 10. The closing mechanism 200 will be described below.

[0064] The closing mechanism 200 shown in FIGS. 4 to 7 mainly includes a closing member 210, a pressing member 220, a fixing member 230, a blocking member 240, and the like.

[0065] The blocking member 210 blocks the opening 10c, thereby blocking communication between the spaces above and below the second floor surface 10b via the opening 10c. The blocking member 210 is made of a flexible material (e.g., rubber, etc.). The blocking member 210 is formed in a plate shape having an outer shape (approximately rectangular in this embodiment) that corresponds to the shape of the opening 10c. The blocking member 210 can be attached to the opening 10c by fitting a groove 210a (see FIG. 6) formed on the outer periphery of the blocking member 210 into the opening 10c of the second floor surface 10b. The blocking member 210 includes a notch 211, a raised portion 212, a bulged portion 213, etc.

[0066] 7 is a portion formed by cutting out a part of the blocking member 210. The cutting portion 211 is formed in a portion corresponding to the reinforcing portion 132. Specifically, the cutting portion 211 is formed at the right end portion of the blocking member 210. The cutting portion 211 is formed in a shape (substantially rectangular) corresponding to the outer shape of the reinforcing portion 132 in a plan view. The reinforcing portion 132 is disposed so as to extend vertically across the second floor surface 10b via the cutting portion 211.

[0067] The standing portion 212 is a portion formed to rise upward from the periphery of the cutout portion 211. The standing portion 212 is formed to surround the cutout portion 211 from the front, rear, and left. The standing portion 212 can surround the reinforcing portion 132, which is arranged to pass through the cutout portion 211, from the sides, and therefore the gap between the cutout portion 211 and the reinforcing portion 132 can be reduced.

[0068] The bulging portions 213 shown in FIGS. 4 to 7 are formed to bulge a portion of the blocking member 210 upward. The bulging portions 213 are formed at positions corresponding to the link mechanism 160 (first rod 161 and second rod 162) passing through the opening 10c. Two bulging portions 213 are formed corresponding to the first rod 161 and the second rod 162. A through-hole is formed in the upper portion of the bulging portion 213, allowing the first rod 161 and the second rod 162 to pass through. The first rod 161 and the second rod 162 are arranged to move up and down across the second floor surface 10b through the through-hole. The bulging portions 213 can elastically deform appropriately in response to the movement of the first rod 161 and the second rod 162, and therefore do not impede the movement of the first rod 161 and the second rod 162.

[0069] The pressing member 220 shown in Figures 4, 6, and 7 is used to press the standing portion 212 against the reinforcing portion 132. The pressing member 220 is made of a flexible material (e.g., rubber, etc.). In a plan view, the pressing member 220 is formed in a generally U-shape that opens to the right. The pressing member 220 is fitted into the standing portion 212 from the left so as to surround the standing portion 212 from the outside. A pair of front and rear claws 221 are formed on the right end of the pressing member 220. The pressing member 220 can be attached to the reinforcing portion 132 by engaging the claws 221 with the right end of the reinforcing portion 132.

[0070] The fixing member 230 is used to fix the pressing member 220 and the standing portion 212 to the reinforcing portion 132. The fixing member 230 is configured by a fastener such as a screw having a head portion 231 and a shaft portion 232. The shaft portion 232 of the fixing member 230 is inserted through the pressing member 220, the standing portion 212, and the reinforcing portion 132 from the left, and is engaged with the reinforcing portion 132. The fixing member 230 can press the pressing member 220 and the standing portion 212 toward the reinforcing portion 132 with the head portion 231.

[0071] The blocking member 240 shown in FIGS. 6 and 7 is disposed inside the reinforcing portion 132 and blocks communication between the spaces above and below the second floor surface 10b via the inside of the reinforcing portion 132. The blocking member 240 is formed from a flexible material (e.g., sponge, etc.). The blocking member 240 is formed in a shape (rectangular parallelepiped) corresponding to the space inside the reinforcing portion 132. The blocking member 240 is disposed inside the reinforcing portion 132 in a compressed state by the reinforcing portion 132. The blocking member 240 is disposed so that at least a portion thereof overlaps (is at the same height as) the upright portion 212 of the blocking member 210 in the vertical direction. The blocking member 240 is also disposed so that at least a portion thereof overlaps (is at the same height as) the protruding portion 134a of the lower fixing portion 134 in the vertical direction. In this manner, the blocking member 240 is disposed so as to be laterally surrounded by the reinforcing portion 132 and the protruding portion 134a. The blocking member 240 is pressed from the right by the claw portion 221 of the pressing member 220 attached to the reinforcing portion 132 and is held in place.

[0072] The blocking mechanism 200 configured as described above can suppress the transmission of noise from the opening 10c formed in the second floor surface 10b into the cabin 10. Specifically, the transmission of noise can be suppressed by blocking the opening 10c with the blocking member 210. Furthermore, the standing portion 212, the pressing member 220, and the fixing member 230 can reduce the gap between the blocking member 210 and the reinforcing portion 132, thereby more effectively suppressing the transmission of noise. Furthermore, the blocking member 240 can also block the space inside the reinforcing portion 132, thereby more effectively suppressing the transmission of noise.

[0073] As described above, the tractor 1 (work vehicle) according to this embodiment includes the first support portion 120 that supports the loader lever 110 so that it can swing back and forth, and the second support portion 130 that supports the first support portion 120 so that it can swing left and right. The second support portion 130 includes a reinforcing portion 132 that is U-shaped in cross section and has a pair of first plate-shaped portions 132a extending left and right and a second plate-shaped portion 132b that connects the pair of first plate-shaped portions 132a. This configuration allows the loader lever 110 to be stably supported. In other words, the pair of first plate-shaped portions 132a extending left and right can suppress left and right deflection of the second support portion 130.

[0074] The reinforcing portion 132 is further provided with a blocking member 210 that is arranged to penetrate vertically through an opening 10c formed in the floor surface (second floor surface 10b) of the cabin 10 and that is arranged to block the opening 10c through which the reinforcing portion 132 is inserted. With this configuration, it is possible to suppress noise from being transmitted upward (into the cabin 10) through the opening 10c.

[0075] The blocking member 210 also includes an erected portion 212 that erects so as to surround the reinforcing portion 132 from the side. With this configuration, the gap between the reinforcing portion 132 and the blocking member 210 can be reduced, and the transmission of noise can be more effectively suppressed.

[0076] The tractor 1 further includes a pressing member 220 that is provided to press the erected portion 212 against the reinforcing portion 132. With this configuration, the gap between the reinforcing portion 132 and the blocking member 210 can be reduced, and the transmission of noise can be more effectively suppressed.

[0077] The tractor 1 further includes a fixing member 230 that fixes the pressing member 220 and the erected portion 212 to the reinforcing portion 132. With this configuration, the gap between the reinforcing portion 132 and the blocking member 210 can be reduced, and the transmission of noise can be more effectively suppressed.

[0078] The tractor 1 further includes a blocking member 240 that is disposed inside the reinforcing portion 132 and blocks communication between the spaces above and below the floor surface via the inside of the reinforcing portion 132, and the blocking member 240 is disposed so that at least a portion of the blocking member 240 overlaps with the standing portion 212 in the vertical direction. This configuration can suppress noise from being transmitted upward (into the cabin 10) via the space inside the reinforcing portion 132. In particular, by disposing the blocking member 240 at the same height as the standing portion 212, noise transmission can be effectively suppressed at the height position of the blocking member 240.

[0079] The tractor 1 further includes a blocking member 240 that is disposed inside the reinforcing portion 132 and blocks communication between the spaces above and below the floor surface via the inside of the reinforcing portion 132. With this configuration, it is possible to suppress noise from being transmitted to the upper side (inside the cabin 10) via the space inside the reinforcing portion 132.

[0080] The second support part 130 is fixed to the fender 8 at a position (lower fixed part 134) lower than the left-right swing shaft 123 (swing shaft) that swingably supports the first support part 120. With this configuration, even if the left-right swing shaft 123 is provided at a position relatively far from the fixed position, the reinforcing part 132 can suppress left-right deflection of the second support part 130.

[0081] The left-right pivot shaft 123 according to this embodiment is one embodiment of the pivot shaft according to the present invention.

[0082] The specific configuration (shape, arrangement, fixing method, etc. of each part) of the loader operation mechanism 100 (first support part 120, second support part 130, etc.) is not limited to the above embodiment and can be changed as desired.

[0083] Furthermore, the specific configuration of the closing mechanism 200 is not limited to the above embodiment and can be changed as desired. For example, the closing mechanism 200 can be formed into any shape depending on the shape of the opening 10c formed in the floor surface (second floor surface 10b) of the cabin 10.

[0084] Next, the position operation mechanism 300 and the hydraulic operation mechanism 400 shown in FIGS. 8 to 12 will be described.

[0085] The position operation mechanism 300 is used to raise and lower the lifting device 5. The position operation mechanism 300 mainly includes a position lever 310, a first support portion 320, a first link mechanism 330, and the like.

[0086] The position lever 310 shown in Figure 8 and Figures 10 to 12 is an operating tool used by an operator to operate the lifting device 5. The position lever 310 is formed in a longitudinal shape extending vertically. The position lever 310 includes a cylindrical portion 311 and the like.

[0087] The cylindrical portion 311 is a portion formed in a cylindrical shape. The cylindrical portion 311 is fixed to a lower portion of the position lever 310. The axis of the cylindrical portion 311 is oriented substantially in the front-rear direction.

[0088] The first support portion 320 shown in Figures 8 and 9 supports a first link mechanism 330 (described later) and the like so that the first support portion 320 can swing. The first support portion 320 is formed by appropriately combining appropriate members (such as multiple plate-shaped members). The first support portion 320 is formed in a longitudinal shape that is long in the vertical direction. The upper portion of the first support portion 320 is formed so as to protrude to the right relative to the lower portion. The first support portion 320 includes a lever swing shaft 321, a first swing shaft 322, a nut 323, a bolt 324, and the like.

[0089] The lever pivot shaft 321 shown in Figures 8, 10, and 11 serves as the central axis for pivoting the position lever 310. The lever pivot shaft 321 is formed in a cylindrical shape with its axis Xp oriented substantially in the front-to-rear direction. The lever pivot shaft 321 is fixed to the upper part of the first support part 320. The lever pivot shaft 321 is disposed so as to protrude forward from the first support part 320. The lever pivot shaft 321 is inserted into the cylindrical part 311 of the position lever 310. This supports the position lever 310 so as to be pivotable about the lever pivot shaft 321.

[0090] The first swing shaft 322 serves as the central axis of swing of a first swinging portion 332 of a first link mechanism 330, which will be described later. The first swing shaft 322 is formed in a cylindrical shape with its axis oriented substantially in the front-rear direction (parallel to the lever swing shaft 321). The first swing shaft 322 is fixed to a vertical midpoint of the first support portion 320. More specifically, the first swing shaft 322 is disposed in a position that is laterally inward (leftward) and lower than the lever swing shaft 321. The first swing shaft 322 is disposed so as to protrude forward from the first support portion 320.

[0091] 8 is fixed to the upper part of the first support part 320 (at a position higher than the first pivot shaft 322 and the second pivot shaft 433 described later). A bolt (not shown) is fastened to the nut 323 from the outer surface (right side surface) of the fender 8, thereby fixing the first support part 320 to the fender 8.

[0092] 8 and 9 is fixed to the lower part of the first support part 320 (at a position lower than the first swing shaft 322 and the second swing shaft 433 described later). The shaft part (not shown) of the bolt 324 is provided so as to protrude outward (to the right) from the first support part 320 and is inserted into the fender 8 (see FIG. 3). A nut (not shown) is fastened to the bolt 324 from the outside (right side surface) of the fender 8, thereby fixing the first support part 320 to the fender 8.

[0093] 8 to 11 is for transmitting the operating force of the position lever 310. The first link mechanism 330 mainly includes a horizontal link portion 331, a first swing portion 332, a rod 333, etc.

[0094] The horizontal link portion 331 connects the position lever 310 and a first swinging portion 332, which will be described later. The horizontal link portion 331 is formed in a flat plate shape. The horizontal link portion 331 is disposed with its longitudinal direction oriented substantially horizontally. In this embodiment, substantially horizontal means that the angle between the longitudinal direction and the horizontal plane is 45 degrees or less. It is preferable that the angle between the horizontal link portion 331 and the horizontal plane is close to 0 degrees. The horizontal link portion 331 is disposed to extend substantially in the left-right direction. The right end of the horizontal link portion 331 is connected to the position lever 310. The left end of the horizontal link portion 331 is connected to the first swinging portion 332, which will be described later.

[0095] The first swinging portion 332 is a member that swings in response to operation of the position lever 310. The first swinging portion 332 is formed in a substantially cylindrical shape. The first swinging shaft 322 is inserted into the first swinging portion 332. This supports the first swinging portion 332 so that it can swing relative to the first swinging shaft 322. The first swinging portion 332 includes a first arm portion 332a and a second arm portion 332b.

[0096] The first arm portion 332a is a portion to which the horizontal link portion 331 is connected. The first arm portion 332a is formed so as to protrude substantially upward from the rear end portion of the first swinging portion 332.

[0097] The second arm portion 332b is a portion to which a rod 333, which will be described later, is connected. The second arm portion 332b is formed so as to protrude substantially rightward from the front end portion of the first swinging portion 332.

[0098] The rod 333 is formed in a rod shape with its longitudinal direction facing up and down. The upper end of the rod 333 is connected to the second arm portion 332b. The lower end of the rod 333 is connected to a control valve (not shown) via an appropriate link mechanism (not shown). By operating the control valve through the operation of the position lever 310, the supply of hydraulic oil to the lifting device 5 can be controlled, and the lifting device 5 can be raised and lowered as desired.

[0099] The hydraulic operation mechanism 400 shown in Figures 8 to 12 is for controlling the supply of hydraulic pressure to various working devices provided on the tractor 1. The hydraulic operation mechanism 400 mainly comprises hydraulic operation levers (a first hydraulic operation lever 410A, a second hydraulic operation lever 410B, and a third hydraulic operation lever 410C), a lever support portion 420, a second support portion 430, a second link mechanism 440, etc.

[0100] In this embodiment, an example is shown in which three hydraulic control levers (a first hydraulic control lever 410A, a second hydraulic control lever 410B, and a third hydraulic control lever 410C) are provided, which allows three different hydraulic devices to be operated independently.

[0101] The first hydraulic control lever 410A shown in Figures 8 and 10 is an operating tool used by an operator to operate a hydraulically actuated working device. The first hydraulic control lever 410A is formed in a longitudinal shape extending vertically. The first hydraulic control lever 410A is supported so as to be able to swing on a lever support portion 420, which will be described later. The first hydraulic control lever 410A includes a cylindrical portion 411, an arm portion 412, etc.

[0102] The cylindrical portion 411 is a portion formed in a cylindrical shape. The cylindrical portion 411 is fixed to a lower portion of the first hydraulic control lever 410A. The cylindrical portion 411 is disposed with its axis oriented substantially in the front-rear direction.

[0103] The arm portion 412 is a portion to which an upper link portion 441A (described later) is connected. The arm portion 412 is formed so as to protrude from the cylindrical portion 411 substantially leftward.

[0104] Although detailed description will be omitted, the second hydraulic control lever 410B and the third hydraulic control lever 410C are formed in substantially the same manner as the first hydraulic control lever 410A. Like the first hydraulic control lever 410A, the second hydraulic control lever 410B and the third hydraulic control lever 410C include a cylindrical portion 411 and an arm portion 412.

[0105] The first hydraulic control lever 410A, the second hydraulic control lever 410B, and the third hydraulic control lever 410C are arranged rearward of the position lever 310 and aligned in the front-to-rear direction.

[0106] 8 and 10 supports the hydraulic control lever so that it can swing. The lever support part 420 is formed by appropriately combining appropriate members (such as multiple plate-shaped members). The lever support part 420 includes a front support plate 421 and a rear support plate 422.

[0107] The front support plate 421 supports the first hydraulic control lever 410A and the second hydraulic control lever 410B. The front support plate 421 is disposed with its plate surface facing substantially in the front-to-rear direction. The front support plate 421 is provided with a first lever swing shaft 423A and a second lever swing shaft 423B.

[0108] The first lever swing shaft 423A serves as the central axis for swinging of the first hydraulic control lever 410A. The first lever swing shaft 423A is formed in a cylindrical shape with an axis Xh1 oriented substantially in the front-to-rear direction. The first lever swing shaft 423A is arranged so as to protrude forward from the front support plate 421. The first lever swing shaft 423A is inserted into the cylindrical portion 411 of the first hydraulic control lever 410A. This supports the first hydraulic control lever 410A so that it can swing relative to the first lever swing shaft 423A.

[0109] The second lever pivot shaft 423B serves as the central axis for pivoting the second hydraulic control lever 410B. The second lever pivot shaft 423B is formed in a cylindrical shape with an axis Xh2 oriented substantially in the front-to-rear direction. In this embodiment, the axis Xh2 of the second lever pivot shaft 423B is arranged so as to be parallel to the axis Xh1 of the first lever pivot shaft 423A. The second lever pivot shaft 423B is arranged so as to protrude rearward from the front support plate 421. The second lever pivot shaft 423B is inserted into the cylindrical portion 411 of the second hydraulic control lever 410B. This supports the second hydraulic control lever 410B so as to be pivotable about the second lever pivot shaft 423B.

[0110] The rear support plate 422 is a portion that supports the third hydraulic control lever 410C. The rear support plate 422 is disposed behind the front support plate 421 with its plate surface facing substantially in the front-to-rear direction. A third lever swing shaft 423C is provided on the rear support plate 422.

[0111] The third lever swing shaft 423C serves as the central axis for swinging of the third hydraulic control lever 410C. The third lever swing shaft 423C is formed in a cylindrical shape with an axis Xh3 oriented substantially in the front-to-rear direction. The third lever swing shaft 423C is disposed so as to protrude rearward from the rear support plate 422. The third lever swing shaft 423C is inserted into the cylindrical portion 411 of the third hydraulic control lever 410C. This supports the third hydraulic control lever 410C so that it can swing relative to the third lever swing shaft 423C.

[0112] Here, the swing directions (operation directions) of the position lever 310 and the three hydraulic operation levers will be specifically described.

[0113] 10 , in a plan view, the axis Xp of the pivot shaft of the position lever 310, the axes Xh1 and Xh2 of the pivot shafts of the first hydraulic control lever 410A and the second hydraulic control lever 410B, and the axis Xh3 of the pivot shaft of the third hydraulic control lever 410C are all different in direction. Specifically, the axes Xh1 and Xh2 of the pivot shafts of the first hydraulic control lever 410A and the second hydraulic control lever 410B are arranged so that their angle with respect to the front-to-rear direction is smaller than that of the axis Xp of the pivot shaft of the position lever 310 located on the front side. As a result, the operation directions (pivoting directions) Mh1 and Mh2 of the first hydraulic control lever 410A and the second hydraulic control lever 410B are arranged so that their angle with respect to the front-to-rear direction is larger than that of the operation direction Mp of the position lever 310 in a plan view. In other words, the operating directions Mh1 and Mh2 of the first hydraulic operating lever 410A and the second hydraulic operating lever 410B, which are located on the rear side, are positioned so as to be more outward than the operating direction Mp of the position lever 310, which is located on the front side.

[0114] Furthermore, the axis Xh3 of the pivot shaft of the third hydraulic control lever 410C is positioned so that its angle with respect to the front-to-rear direction is smaller than that of the axes Xh1 and Xh2 of the pivot shafts of the first hydraulic control lever 410A and the second hydraulic control lever 410B, which are located at the front. As a result, the operation direction (pivot direction) Mh3 of the third hydraulic control lever 410C in a plan view is positioned so that its angle with respect to the front-to-rear direction is larger than that of the operation directions Mh1 and Mh2 of the first hydraulic control lever 410A and the second hydraulic control lever 410B. In other words, the operation direction Mh3 of the third hydraulic control lever 410C, which is located at the rear, is positioned so that it points outward more than the operation directions Mh1 and Mh2 of the first hydraulic control lever 410A and the second hydraulic control lever 410B, which are located at the front.

[0115] In this embodiment, the levers arranged at the rear are arranged so that the operating direction of the lever arranged at the front is parallel to or faces outward (at a larger angle with respect to the front-to-rear direction) the operating direction of the lever arranged at the front. This configuration allows the operating direction of the levers to be set approximately radially from the arm (near the elbow) of the operator seated on the seat 14, thereby improving the operability of each lever.

[0116] 8, 9, 11, and 12 supports a second link mechanism 440 (described later) so that the second link mechanism 440 can swing. The second support part 430 mainly includes a first support plate 431, a second support plate 432, a second swing shaft 433, a bolt 434, etc.

[0117] The first support plate 431 shown in Figures 9, 11, and 12 is a portion that supports one end (right end) of a second pivot shaft 433, which will be described later. The first support plate 431 is formed in a longitudinal shape that is long in the vertical direction. The first support plate 431 is formed in a flat plate shape and is disposed with the plate surface facing in the left-right direction. The first support plate 431 is disposed at a position lower than the lever support portion 420.

[0118] 9 and 11 is a portion that supports the other end (left end) of a second oscillation shaft 433, which will be described later. The second support plate 432 is formed in a longitudinal shape that is long in the vertical direction. The second support plate 432 is bent so that a middle portion in the vertical direction bulges to the left. Both upper and lower ends of the second support plate 432 are fixed to the first support plate 431, respectively.

[0119] The second swing shaft 433 shown in Figures 9, 11, and 12 serves as the central swing axis of second swinging units 442A, 442B, and 442C of the second link mechanism 440, which will be described later. The second swing shaft 433 is formed in a cylindrical shape with its axis oriented substantially in the left-right direction. One end (right end) of the second swing shaft 433 is fixed to the first support plate 431, and the other end (left end) of the second swing shaft 433 is fixed to a vertical midpoint (a portion bulging out to the left) of the second support plate 432. In this way, both ends of the second swing shaft 433 are supported by the first support plate 431 and the second support plate 432.

[0120] 9 and 11 is fixed to the lower part of the first support plate 431 (the part below the second pivot shaft 433). The shaft (not shown) of the bolt 434 is provided to protrude outward (to the right) from the first support plate 431 and is inserted into the fender 8 (see FIG. 3). A nut (not shown) is fastened to the bolt 434 from the outside (right side surface) of the fender 8, thereby fixing the second support part 430 to the fender 8. Note that this embodiment shows an example in which the second support part 430 is fixed to the fender 8 by two bolts 434. One of the bolts 434 also serves as a fastener for fixing the second support plate 432 to the first support plate 431.

[0121] 8 and 9 , an upper portion of the second support portion 430 (a portion above the second oscillation shaft 433) is fixed to the first support portion 320. The upper portion of the second support portion 430 is fixed to the first support portion 320 using an appropriate fastener (for example, bolt B).

[0122] In this way, the second support portion 430 is not only fixed to the fender 8 at a position lower than the second pivot shaft 433, but is also fixed to the first support portion 320 at a position higher than the second pivot shaft 433. By fixing the second support portion 430 to the first support portion 320 in this way, the second support portion 430 can be reinforced by the first support portion 320. In particular, in this embodiment, only the portion of the second support portion 430 below the second pivot shaft 433 is fixed to the fender 8, which raises concerns about bending, deformation, and the like due to insufficient strength of the upper portion of the second support portion 430. However, by reinforcing the upper portion of the second support portion 430 using the first support portion 320 as in this embodiment, bending, and the like of the second support portion 430 can be suppressed.

[0123] 8 to 12 is for transmitting the operating force of three hydraulic control levers (first hydraulic control lever 410A, etc.) The second link mechanism 440 mainly includes upper link portions 441A, 441B, 441C, second swing portions 442A, 442B, 443B, and lower link portions 443A, 443B, 443C.

[0124] Of the second link mechanism 440, the upper link portion 441A, the second swinging portion 442A, and the lower link portion 443A are members for transmitting the operating force of the first hydraulic control lever 410A, and therefore their reference numerals are given the same "A" as the reference numeral of the first hydraulic control lever 410A. Similarly, the reference numerals for the members for transmitting the operating force of the second hydraulic control lever 410B are given the letter "B," and the reference numerals for the members for transmitting the operating force of the third hydraulic control lever 410C are given the letter "C." Because the structures for transmitting the operating forces of the three hydraulic control levers are similar, in the following explanation, explanations of similar configurations will be omitted as appropriate.

[0125] The upper link portion 441A is for transmitting the pivoting operation of the first hydraulic control lever 410A. The upper link portion 441A is formed in a rod shape with its longitudinal direction facing up and down. The upper link portion 441A is bent as appropriate. The upper end portion of the upper link portion 441A is connected to the arm portion 412 of the first hydraulic control lever 410A.

[0126] Similarly, the upper ends of the upper link portion 441B and the upper link portion 441C are connected to the second hydraulic control lever 410B and the third hydraulic control lever 410C, respectively.

[0127] The second swinging portion 442A is a member that swings in response to operation of the first hydraulic control lever 410A. The second swinging portion 442A is formed in the shape of a plate with its longitudinal direction oriented in the front-to-rear direction. A front-to-rear midpoint of the second swinging portion 442A is disposed so as to pass between the first support plate 431 and the second support plate 432. The front-to-rear midpoint of the second swinging portion 442A is inserted into the second swing shaft 433. This supports the second swinging portion 442A so as to be swingable relative to the second swing shaft 433. The rear end of the second swinging portion 442A is connected to the lower end of the upper link portion 441A.

[0128] The second swinging portions 442A, 442B, and 442C are arranged side by side on the left and right. Similar to the second swinging portion 442A, the second swinging portion 442B and the second swinging portion 442C are supported so as to be swingable about the second swing shaft 433. The rear ends of the second swinging portion 442B and the second swinging portion 442C are connected to the lower ends of the upper link portion 441B and the upper link portion 441C, respectively.

[0129] The lower link portion 443A is formed of a member (such as a plate-shaped member or a rod-shaped member) with its longitudinal direction facing up and down. The upper end of the lower link portion 443A is connected to the front end of the second swinging portion 442A. The lower end of the lower link portion 443A is connected to a control valve (not shown) via an appropriate link mechanism (not shown). By operating the control valve through the operation of the first hydraulic control lever 410A, the supply of hydraulic oil to the working device can be controlled.

[0130] Similarly, the upper ends of the lower link portion 443B and the lower link portion 443C are respectively connected to the second swing portion 442B and the second swing portion 442C. The upper ends of the lower link portion 443B and the lower link portion 443C are respectively connected to a control valve (not shown) via an appropriate link mechanism (not shown).

[0131] As described above, the tractor 1 (work vehicle) according to this embodiment includes: a position lever 310 that is disposed on the right console 13 (console) provided to the side of the seat 14 and that can adjust the elevation position of the lifting device 5; and a plurality of hydraulic control levers (a first hydraulic control lever 410A, a second hydraulic control lever 410B, and a third hydraulic control lever 410C) that are disposed on the console rearward of the position lever 310 and that can control the supply of hydraulic pressure to the work devices. The position lever 310 and the hydraulic control levers are disposed so that their operation directions in a plan view are parallel to the operation directions of the other levers disposed in front of them or at a larger angle relative to the front-to-rear direction than the operation directions of the other levers disposed in front of them. This configuration improves the operability of the position lever 310 and the hydraulic control levers. Specifically, by arranging the position lever 310 and the hydraulic control levers so that the levers disposed further rearward swing outward, the levers can be oriented in a way that makes them easier for the operator seated in the seat 14 to operate.

[0132] The tractor 1 also comprises: a first link mechanism 330 including a first swinging portion 332 swingable around a first swing shaft 322 and transmitting the operating force of the position lever 310; a first support portion 320 swingably supporting the first swinging portion 332 via the first swing shaft 322; a second link mechanism 440 including second swinging portions 442A, 442B, 442C swingable around a second swing shaft 433 and transmitting the operating force of the hydraulic control lever; and a second support portion 430 swingably supporting the second swinging portions 442A, 442B, 442C via the second swing shaft 433 and fixed to the first support portion 320. With this configuration, by fixing the first support portion 320 that supports the first link mechanism 330 (first swing portion 332) and the second support portion 430 that supports the second link mechanism 440 (second swing portions 442A, 442B, 442C) to each other, it is possible to reinforce one of the first support portion 320 and the second support portion 430 with the other member. This ensures strength even if one of the first support portion 320 and the second support portion 430 has a structure that makes it difficult to fix to the vehicle body (such as the fender 8).

[0133] Furthermore, the second support part 430 is fixed to the fender 8 at a position lower than the second swing shaft 433, and is fixed to the first support part 320 at a position higher than the second swing shaft 433. By configuring it in this manner, the second support part 430, in which the second swing shaft 433 is provided at a position higher than the fixed position relative to the fender 8, can be reinforced by the first support part 320.

[0134] Furthermore, the first support portion 320 is fixed to the fender 8 at a position lower than the second swing shaft 433 and at a position higher than the second swing shaft 433. With this configuration, the second support portion 430 can be more firmly reinforced by the first support portion 320 fixed to the fender 8 above and below the second swing shaft 433.

[0135] Furthermore, the first support portion 320 is fixed to the fender 8 at a position lower than the first swing shaft 322 and at a position higher than the first swing shaft 322. With this configuration, the second support portion 430 can be more firmly reinforced by the first support portion 320 fixed to the fender 8 above and below the first swing shaft 322.

[0136] Furthermore, the first support portion 320 pivotally supports the position lever 310. With this configuration, the first support portion 320 supports not only the first link mechanism 330 (first pivot portion 332) but also the position lever 310, thereby simplifying the structure.

[0137] The first link mechanism 330 is disposed with its longitudinal direction oriented substantially horizontally and includes a horizontal link portion 331 that connects the position lever 310 and the first swing portion 332. With this configuration, the horizontal link portion 331 can be used to increase the degree of freedom in the horizontal placement of the position lever 310. This allows the position lever 310 to be placed in a position that makes it easy to operate, for example.

[0138] The right console 13 according to this embodiment is one embodiment of a console according to the present invention.

[0139] The specific configurations of the position operation mechanism 300 and the hydraulic operation mechanism 400 (shape, arrangement, fixing method, etc. of each part) are not limited to those in the above embodiment and can be changed as desired. For example, the number and arrangement of the hydraulic operation levers can be changed as desired. Furthermore, the fixing positions of the first support portion 320 and the second support portion 430 relative to the fender 8 (fastening positions using bolts, etc.) can be changed as desired.

[0140] In addition, in the above embodiment, an example has been shown in which the second support portion 430 is reinforced by fixing the second support portion 430 to the first support portion 320, but the present invention is not limited to this. For example, it is also possible to reinforce the first support portion 320 by fixing the first support portion 320 to the second support portion 430. Which member is to be reinforced can be selected appropriately depending on the fixing position on the fender 8, the number of fixing portions, etc.

[0141] In addition, in the above embodiment, a configuration is exemplified in which the first support portion 320 supports not only the first link mechanism 330 but also the position lever 310, but the present invention is not limited to this, and it is also possible to support the position lever 310 by a member other than the first support portion 320.

[0142] The present invention can be applied to a work vehicle equipped with a hydraulic control lever.

[0143] REFERENCE SIGNS LIST 1 Tractor 5 Lifting device 10 Cabin 10b Second floor surface 10c Opening 13 Right console 14 Seat 110 Loader lever 120 First support portion 123 Left / right swing shaft 130 Second support portion 132 Reinforcement portion 132a First plate-shaped portion 132b Second plate-shaped portion 210 Blocking member 212 Standing portion 220 Pressing member 230 Fixing member 240 Blocking member 310 Position lever 320 First support portion 322 First swing shaft 330 First link mechanism 331 Horizontal link portion 332 First swing portion 410A First hydraulic operation lever 410B Second hydraulic operation lever 410C Third hydraulic operation lever 430 Second support portion 433 Second swing shaft 440 Second link mechanism 442A Second swinging part

Claims

1. A work vehicle, comprising: a position lever disposed on a console provided on a side of a seat and capable of adjusting a lifting position of a lifting device; and a plurality of hydraulic operation levers disposed behind the position lever in the console and capable of controlling supply of hydraulic pressure to a working device, wherein the position lever and the hydraulic operation levers are arranged such that an operation direction in a plan view is parallel to an operation direction of another lever disposed on a front side or has a larger angle with respect to the front-rear direction than the operation direction of the other lever disposed on the front side.

2. The work vehicle according to claim 1, further comprising: a first link mechanism including a first swing part swingable about a first swing axis and transmitting an operation force of the position lever; a first support part swingably supporting the first swing part via the first swing axis; a second link mechanism including a second swing part swingable about a second swing axis and transmitting an operation force of the hydraulic operation lever; and a second support part swingably supporting the second swing part via the second swing axis and fixed to the first support part.

3. The work vehicle according to claim 2, wherein the second support part is fixed to a fender at a position lower than the second swing axis and fixed to the first support part at a position higher than the second swing axis.

4. The work vehicle according to claim 2, wherein the first support part is fixed to a fender at a position lower than the second swing axis and at a position higher than the second swing axis.

5. The work vehicle according to claim 2, wherein the first support part is fixed to a fender at a position lower than the first swing axis and at a position higher than the first swing axis.

6. The work vehicle according to claim 2, wherein the first support part swingably supports the position lever.

7. The work vehicle according to any one of claims 2 to 6, wherein the first link mechanism includes a horizontal link part arranged with its longitudinal direction substantially in a horizontal direction and connecting the position lever and the first swing part.

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